Patent US4051044A successfully refreshed from Google Patents.
US4051044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge surface treating apparatus
Assignee: SOFTAL ELEKTRONIK ERIK BLUMENFELD KG
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Filing: 1975-12-29
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Granted: 1977-09-27
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Expires: 1995-12-29
Abstract
Abstract Apparatus for treating the surface of an object by means of an electrical discharge comprises a cylindrical electrode and a knife electrode, arranged on the same side of the surface to be treated, the knife electrode being tangential to the cylindrical electrode and separated therefrom by a discharge gap through which there is a flow of gas towards the object under treatment.
Inventors
- 👤 Bent Sorensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:27
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/10; B29C59/103; B29C59/106; B29C59/12; H; H01; H01T; H01T19/00; B29L; B29L2009/00; B29L2031/00; B29L2031/712; B29L2031/7158
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
Apparatus for the treatment of the surface of an object of conductive or non-conductive material by raising the surface energy thereof, comprising: means defining a first rotatable cylindrical electrode with a surface adapted to lie along the surface of the object, a second knife-like electrode with the edge thereof lying along said surface of said cylindrical electrode in closely spaced relation to define a discharge gap between the electrodes, the knife-like electrode lying substantially tangentially to the cylindrical electrode, object-supporting means adapted to maintain such an object in contact with said surface of said first cylindrical electrode, and means for providing a flow of gas through the discharge gap between the electrodes.
Claim 2
Dependent Claim
112 words
Apparatus for the treatment of the surface of an object of conductive or non-conductive material by raising the surface energy thereof, comprising: means defining a first rotatable cylindrical electrode with a surface adapted to lie along the surface of the object, a second knife-like electrode with the edge thereof lying along said surface of said cylindrical electrode in closely spaced relation to define a discharge gap between the electrodes, the knife-like electrode lying substantially tangentially to the cylindrical electrode, object-supporting means adapted to maintain such an object in contact with said surface of said first cylindrical electrode, and means for providing a flow of gas through the discharge gap between the electrodes.
Claim 3
Dependent Claim
42 words
Apparatus as claimed in claim 1, further comprising means defining walls cooperating with the knife-like electrode in defining a closed pressure chamber, the cylindrical electrode lying substantially within the closed chamber, and said knife-like electrode forming a wall portion of the chamber.
Claim 4
Dependent Claim
59 words
Apparatus as claimed in claim 2, and including a pair of said knife-like electrodes forming adjacent wall portions of the closed chamber and defining between them a space through which the cylindrical electrode is exposed and each of said knife-like electrodes being substantially tangential to the surface of the cylindrical electrode and being separated therefrom by a discharge gap.
Claim 5
Dependent Claim
26 words
Apparatus as claimed in claim 3, in which the knife-like electrodes are arranged obliquely of each other and in a direction convergently toward the cylindrical electrode.
Claim 6
Dependent Claim
33 words
Apparatus as claimed in claim 1, including means for supplying to the voltage-carrying electrode an electric waveform the frequency of which lies above 10 kHz and the voltage of which is above 5kV.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |